Complete question:
Determine the formula unit and name for the compound formed when each pair of ions interacts. In the formula, capitalization and subscripts are graded. Spelling counts. Formula Name a) Al3+ and CN- b)Mg²+ and SO4²- c) Li+ and (C2H3O2)-1 d) NH4+ and Br-
Answer:
a) Al3+ and CN-
Al(CN)3
Aluminium Cyanide
b) Mg²+ and SO4²-
MgSO4
Magnesium Sulfate
c) Li+ and (C2H3O2)-1
C2H3LiO2.
lithium acetate
d) NH4+ and Br-
NH4Br.
Ammonium bromide.
Explanation:
a) Al3+ and CN-
The formula unit can be gotten when you cross multiply the charges .
Al(CN)3 . The combination is between a cation, aluminium ion and an anion, cyanide ion. The compound is called Aluminium Cyanide.
b) Mg²+ and SO4²-
The charges are 2+ and 2- . Divide both sides by 2 , you will get 1.
cross multiply the +1 and -1 charges , you will get
MgSO4. The combination is between a magnesium ion (cation) and a sulfate ion. The compound is called Magnesium Sulfate.
c) Li+ and (C2H3O2)-1
The charges are cross multiplied since they have +1 and -1 charges,
C2H3LiO2. It is a combination of lithium ion and acetate ion. The compound name is lithium acetate.
d) NH4+ and Br-
The charges are +1 and -1. so we cross multiply to get the formula unit as
NH4Br. It is a combination of ammonium ion and bromine ion. The name of the compound is Ammonium bromide.
